======================================
| [ 40.575901][ T304] #0: ffffffff929dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 40.576248][ T304] #1: ffff888005b52c58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) 
| [   40.576568][  T304]
| [   40.576568][  T304] stack backtrace:
[   40.577063][  T304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   40.577454][  T304] Call Trace:
[   40.577595][  T304]  <TASK>
[ 40.577690][ T304] dump_stack_lvl (lib/dump_stack.c:122) 
[ 40.577876][ T304] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 40.578054][ T304] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 40.578241][ T304] br_get_link_af_size_filtered (net/bridge/br_private.h:930 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 40.578469][ T304] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 40.578648][ T304] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 40.578831][ T304] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 40.579014][ T304] br_make_forwarding (net/bridge/br_stp.c:465) 
[ 40.579193][ T304] br_port_state_selection (net/bridge/br_stp.c:495) 
[ 40.579378][ T304] br_stp_enable_port (net/bridge/br_stp_if.c:95) 
[ 40.579553][ T304] br_add_if (net/bridge/br_if.c:687) 
[ 40.579690][ T304] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 40.579869][ T304] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 40.580093][ T304] do_setlink (net/core/rtnetlink.c:2907) 
[ 40.580270][ T304] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 40.580447][ T304] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 40.580626][ T304] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 40.580803][ T304] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 40.580981][ T304] ? __kernel_text_address (kernel/extable.c:79) 
[ 40.581164][ T304] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 40.581348][ T304] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 40.581568][ T304] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 40.581759][ T304] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 40.581936][ T304] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 40.582114][ T304] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 40.582293][ T304] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 40.582433][ T304] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 40.582615][ T304] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 40.582802][ T304] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 40.582989][ T304] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 40.583174][ T304] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 40.583357][ T304] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 40.583590][ T304] ? __create_object (mm/kmemleak.c:751) 
[ 40.583769][ T304] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 40.583959][ T304] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 40.584096][ T304] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 40.584278][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 40.584459][ T304] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 40.584635][ T304] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 40.584775][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 40.584954][ T304] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 40.585138][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 40.585315][ T304] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 40.585518][ T304] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 40.585696][ T304] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 40.585870][ T304] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 40.586048][ T304] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 40.586227][ T304] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 40.586423][ T304] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 40.586605][ T304] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 40.586786][ T304] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 40.586970][ T304] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 40.587158][ T304] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 40.587344][ T304] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 40.587518][ T304] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 40.587737][ T304] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 40.587925][ T304] ___sys_sendmsg (net/socket.c:2653) 
[ 40.588105][ T304] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 40.588282][ T304] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 40.588465][ T304] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 40.588644][ T304] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 40.588872][ T304] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 40.589055][ T304] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 40.589239][ T304] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 40.589591][ T304] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 40.589773][ T304] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 40.589954][ T304] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 40.590131][ T304] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65) 
[ 40.590427][ T304] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 40.590608][ T304] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   40.590831][  T304] RIP: 0033:0x7fdf04b0e7b7
[ 40.591016][ T304] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   40.591746][  T304] RSP: 002b:00007ffe5ff46eb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   40.592023][  T304] RAX: ffffffffffffffda RBX: 00007ffe5ff475e0 RCX: 00007fdf04b0e7b7
[   40.592292][  T304] RDX: 0000000000000000 RSI: 00007ffe5ff46f20 RDI: 0000000000000005
[   40.592554][  T304] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   40.592915][  T304] R10: 000000003e367910 R11: 0000000000000246 R12: 0000000000000004
[   40.593178][  T304] R13: 0000000066beb26d R14: 0000000000496600 R15: 0000000000000000
| [ 40.595733][ T304] #0: ffffffff929dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 40.596051][ T304] #1: ffff888005b52c58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) 
| [   40.596570][  T304]
| [   40.596570][  T304] stack backtrace:
[   40.597054][  T304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   40.597544][  T304] Call Trace:
[   40.597680][  T304]  <TASK>
[ 40.597772][ T304] dump_stack_lvl (lib/dump_stack.c:122) 
[ 40.597953][ T304] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 40.598133][ T304] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 40.598312][ T304] br_get_link_af_size_filtered (net/bridge/br_private.h:453 net/bridge/br_private.h:940 net/bridge/br_netlink.c:105) 
[ 40.598537][ T304] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 40.598715][ T304] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 40.598990][ T304] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 40.599171][ T304] br_make_forwarding (net/bridge/br_stp.c:465) 
[ 40.599351][ T304] br_port_state_selection (net/bridge/br_stp.c:495) 
[ 40.599535][ T304] br_stp_enable_port (net/bridge/br_stp_if.c:95) 
[ 40.599810][ T304] br_add_if (net/bridge/br_if.c:687) 
[ 40.599950][ T304] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 40.600127][ T304] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 40.600350][ T304] do_setlink (net/core/rtnetlink.c:2907) 
[ 40.600620][ T304] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 40.600799][ T304] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 40.600975][ T304] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 40.601151][ T304] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 40.601335][ T304] ? __kernel_text_address (kernel/extable.c:79) 
[ 40.601604][ T304] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 40.601781][ T304] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 40.602003][ T304] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 40.602196][ T304] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 40.602468][ T304] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 40.602647][ T304] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 40.602826][ T304] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 40.602969][ T304] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 40.603253][ T304] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 40.603436][ T304] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 40.603622][ T304] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 40.603801][ T304] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 40.603986][ T304] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 40.604205][ T304] ? __create_object (mm/kmemleak.c:751) 
[ 40.604386][ T304] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 40.604577][ T304] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 40.604715][ T304] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 40.604990][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 40.605167][ T304] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 40.605344][ T304] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 40.605481][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 40.605752][ T304] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 40.605929][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 40.606107][ T304] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 40.606304][ T304] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 40.606579][ T304] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 40.606758][ T304] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 40.606938][ T304] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 40.607114][ T304] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 40.607298][ T304] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 40.607572][ T304] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 40.607749][ T304] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 40.607930][ T304] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 40.608114][ T304] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 40.608393][ T304] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 40.608572][ T304] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 40.608791][ T304] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 40.608978][ T304] ___sys_sendmsg (net/socket.c:2653) 
[ 40.609253][ T304] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 40.609435][ T304] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 40.609614][ T304] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 40.609790][ T304] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 40.610103][ T304] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 40.610282][ T304] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 40.610466][ T304] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 40.610684][ T304] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 40.610966][ T304] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 40.611142][ T304] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 40.611334][ T304] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65) 
[ 40.611531][ T304] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 40.611802][ T304] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   40.612022][  T304] RIP: 0033:0x7fdf04b0e7b7
[ 40.612203][ T304] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   40.612920][  T304] RSP: 002b:00007ffe5ff46eb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   40.613187][  T304] RAX: ffffffffffffffda RBX: 00007ffe5ff475e0 RCX: 00007fdf04b0e7b7
[   40.613544][  T304] RDX: 0000000000000000 RSI: 00007ffe5ff46f20 RDI: 0000000000000005
[   40.613806][  T304] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   40.614076][  T304] R10: 000000003e367910 R11: 0000000000000246 R12: 0000000000000004
[   40.614436][  T304] R13: 0000000066beb26d R14: 0000000000496600 R15: 0000000000000000
| [ 40.617092][ T304] #0: ffffffff929dcac8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg (net/core/rtnetlink.c:6645) 
| [ 40.617431][ T304] #1: ffff888005b52c58 (&br->lock){+...}-{2:2}, at: br_add_if (net/bridge/br_if.c:683) 
| [   40.617750][  T304]
| [   40.617750][  T304] stack backtrace:
[   40.618315][  T304] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[   40.618801][  T304] Call Trace:
[   40.618942][  T304]  <TASK>
[ 40.619033][ T304] dump_stack_lvl (lib/dump_stack.c:122) 
[ 40.619210][ T304] lockdep_rcu_suspicious (./include/linux/context_tracking.h:153 kernel/locking/lockdep.c:6725) 
[ 40.619385][ T304] ? __pfx_br_handle_frame (net/bridge/br_input.c:326) 
[ 40.619653][ T304] br_get_link_af_size_filtered (net/bridge/br_private.h:1611 net/bridge/br_private.h:1608 net/bridge/br_netlink.c:107) 
[ 40.619866][ T304] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 40.620037][ T304] ? __timer_delete (./include/linux/list.h:971 ./include/linux/timer.h:147 kernel/time/timer.c:1426) 
[ 40.620218][ T304] br_info_notify (./include/linux/skbuff.h:1320 ./include/net/netlink.h:1015 net/bridge/br_netlink.c:645) 
[ 40.620486][ T304] br_make_forwarding (net/bridge/br_stp.c:465) 
[ 40.620668][ T304] br_port_state_selection (net/bridge/br_stp.c:495) 
[ 40.620848][ T304] br_stp_enable_port (net/bridge/br_stp_if.c:95) 
[ 40.621024][ T304] br_add_if (net/bridge/br_if.c:687) 
[ 40.621264][ T304] ? rtnl_is_locked (net/core/rtnetlink.c:164) 
[ 40.621440][ T304] ? netdev_master_upper_dev_get (net/core/dev.c:7102) 
[ 40.621664][ T304] do_setlink (net/core/rtnetlink.c:2907) 
[ 40.621843][ T304] ? is_bpf_text_address (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./kernel/bpf/core.c:769) 
[ 40.622019][ T304] ? __pfx_do_setlink (net/core/rtnetlink.c:2778) 
[ 40.622198][ T304] ? is_bpf_text_address (./kernel/bpf/core.c:772) 
[ 40.622374][ T304] ? kernel_text_address (kernel/extable.c:97 kernel/extable.c:94) 
[ 40.622552][ T304] ? __kernel_text_address (kernel/extable.c:79) 
[ 40.622731][ T304] ? unwind_get_return_address (arch/x86/kernel/unwind_orc.c:369 arch/x86/kernel/unwind_orc.c:364) 
[ 40.622998][ T304] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) 
[ 40.623215][ T304] ? arch_stack_walk (arch/x86/kernel/stacktrace.c:26) 
[ 40.623402][ T304] ? stack_trace_save (kernel/stacktrace.c:123) 
[ 40.623577][ T304] ? __pfx_stack_trace_save (kernel/stacktrace.c:114) 
[ 40.623937][ T304] ? __pfx_validate_nla (lib/nlattr.c:396) 
[ 40.624118][ T304] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 40.624255][ T304] ? kasan_save_stack (mm/kasan/common.c:49) 
[ 40.624432][ T304] ? __nla_validate_parse (lib/nlattr.c:638) 
[ 40.624711][ T304] __rtnl_newlink (net/core/rtnetlink.c:3696) 
[ 40.624892][ T304] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 40.625065][ T304] ? __pfx___rtnl_newlink (net/core/rtnetlink.c:3557) 
[ 40.625245][ T304] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 40.625578][ T304] ? __create_object (mm/kmemleak.c:751) 
[ 40.625755][ T304] ? trace_kmalloc (./include/trace/events/kmem.h:54 (discriminator 52)) 
[ 40.625935][ T304] rtnl_newlink (net/core/rtnetlink.c:3744) 
[ 40.626070][ T304] rtnetlink_rcv_msg (net/core/rtnetlink.c:6647) 
[ 40.626262][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 40.626531][ T304] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:227) 
[ 40.626709][ T304] ? mark_lock (kernel/locking/lockdep.c:4655 (discriminator 3)) 
[ 40.626852][ T304] ? __lock_acquire (kernel/locking/lockdep.c:5142) 
[ 40.627030][ T304] netlink_rcv_skb (net/netlink/af_netlink.c:2550) 
[ 40.627313][ T304] ? __pfx_rtnetlink_rcv_msg (net/core/rtnetlink.c:6541) 
[ 40.627491][ T304] ? __pfx_netlink_rcv_skb (net/netlink/af_netlink.c:2527) 
[ 40.627684][ T304] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 net/netlink/af_netlink.c:340) 
[ 40.627860][ T304] ? netlink_deliver_tap (./include/linux/rcupdate.h:336 ./include/linux/rcupdate.h:869 ./include/net/netns/generic.h:48 net/netlink/af_netlink.c:333) 
[ 40.628040][ T304] netlink_unicast (net/netlink/af_netlink.c:1331 net/netlink/af_netlink.c:1357) 
[ 40.628218][ T304] ? __pfx_netlink_unicast (net/netlink/af_netlink.c:1342) 
[ 40.628404][ T304] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 40.628586][ T304] netlink_sendmsg (net/netlink/af_netlink.c:1901) 
[ 40.628768][ T304] ? __pfx_netlink_sendmsg (net/netlink/af_netlink.c:1820) 
[ 40.629033][ T304] ? __might_fault (mm/memory.c:6388 mm/memory.c:6381) 
[ 40.629211][ T304] ? __import_iovec (lib/iov_iter.c:1263 lib/iov_iter.c:1279) 
[ 40.629395][ T304] ____sys_sendmsg (net/socket.c:730 net/socket.c:745 net/socket.c:2597) 
[ 40.629572][ T304] ? __pfx_____sys_sendmsg (net/socket.c:2543) 
[ 40.629839][ T304] ? __pfx_copy_msghdr_from_user (net/socket.c:2523) 
[ 40.630054][ T304] ? __pfx_validate_chain (kernel/locking/lockdep.c:3824) 
[ 40.630242][ T304] ___sys_sendmsg (net/socket.c:2653) 
[ 40.630420][ T304] ? __pfx____sys_sendmsg (net/socket.c:2640) 
[ 40.630689][ T304] ? find_held_lock (kernel/locking/lockdep.c:5249) 
[ 40.630867][ T304] ? __lock_release (kernel/locking/lockdep.c:5435) 
[ 40.631039][ T304] ? __debug_check_no_obj_freed (lib/debugobjects.c:1001) 
[ 40.631256][ T304] ? __pfx___lock_release (kernel/locking/lockdep.c:5411) 
[ 40.631525][ T304] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) 
[ 40.631706][ T304] ? lockdep_hardirqs_on_prepare (kernel/locking/lockdep.c:4299 kernel/locking/lockdep.c:4358) 
[ 40.631931][ T304] ? __fget_light (./include/linux/atomic/atomic-arch-fallback.h:479 ./include/linux/atomic/atomic-instrumented.h:50 fs/file.c:1145) 
[ 40.632112][ T304] __sys_sendmsg (./include/linux/file.h:34 net/socket.c:2682) 
[ 40.632379][ T304] ? __pfx___sys_sendmsg (net/socket.c:2668) 
[ 40.632552][ T304] ? __virt_addr_valid (./arch/x86/include/asm/preempt.h:94 ./include/linux/rcupdate.h:953 ./include/linux/mmzone.h:2034 arch/x86/mm/physaddr.c:65) 
[ 40.632748][ T304] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) 
[ 40.632923][ T304] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) 
[   40.633234][  T304] RIP: 0033:0x7fdf04b0e7b7
[ 40.633416][ T304] Code: 0a 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
All code
========
   0:	0a 00                	or     (%rax),%al
   2:	f7 d8                	neg    %eax
   4:	64 89 02             	mov    %eax,%fs:(%rdx)
   7:	48 c7 c0 ff ff ff ff 	mov    $0xffffffffffffffff,%rax
   e:	eb b9                	jmp    0xffffffffffffffc9
  10:	0f 1f 00             	nopl   (%rax)
  13:	f3 0f 1e fa          	endbr64
  17:	64 8b 04 25 18 00 00 	mov    %fs:0x18,%eax
  1e:	00 
  1f:	85 c0                	test   %eax,%eax
  21:	75 10                	jne    0x33
  23:	b8 2e 00 00 00       	mov    $0x2e,%eax
  28:	0f 05                	syscall
  2a:*	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax		<-- trapping instruction
  30:	77 51                	ja     0x83
  32:	c3                   	ret
  33:	48 83 ec 28          	sub    $0x28,%rsp
  37:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  3b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)

Code starting with the faulting instruction
===========================================
   0:	48 3d 00 f0 ff ff    	cmp    $0xfffffffffffff000,%rax
   6:	77 51                	ja     0x59
   8:	c3                   	ret
   9:	48 83 ec 28          	sub    $0x28,%rsp
   d:	89 54 24 1c          	mov    %edx,0x1c(%rsp)
  11:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
[   40.634029][  T304] RSP: 002b:00007ffe5ff46eb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
[   40.634295][  T304] RAX: ffffffffffffffda RBX: 00007ffe5ff475e0 RCX: 00007fdf04b0e7b7
[   40.634560][  T304] RDX: 0000000000000000 RSI: 00007ffe5ff46f20 RDI: 0000000000000005
[   40.634919][  T304] RBP: 0000000000000004 R08: 0000000000000003 R09: 0000000000000000
[   40.635180][  T304] R10: 000000003e367910 R11: 0000000000000246 R12: 0000000000000004


Finger prints:
lockdep_rcu_suspicious:br_get_link_af_size_filtered:br_info_notify:br_make_forwarding:br_port_state_selection